192-011006N8 PSD1 Installation Guide
192-011006N8 2019-07
09.10.19 09:27
75 (109)
6.6
STO Application examples
6.6.1.
STO and SS1 function with external safety control
In this chapter you can read about:
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Circuit Diagram ......................................................................................................................... 75
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Description ............................................................................................................................... 75
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Functional description ............................................................................................................... 76
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Design Features ....................................................................................................................... 76
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Calculation of the total failure probability ................................................................................... 76
6.6.1.1
Circuit Diagram
6.6.1.2
Description
The application example demonstrate how a 3-axis PSD1-M servo drive
cooperates with the safety control UE410-MU of Sick and with a PLC.
The STO circuit of the 3-axis PSD1-M must support a safe stop 1 of the control
with emergency stop (category 3 - PL e). The application example described here
corresponds to Stop Category 1 as defined by EN60204-1.
Together with the external safety switching device, the "Safe Stop 1”(SS1) safety
function can also be implemented.
A Stop Category 0 in accordance with EN 60204-1 can be implemented, for
example by setting the delay time on the safety switching device to 0. The motor
torque will then be turned off immediately in 2 channels and will not be able to
